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VIOLACEAE 1. RINOREA Aublet, Hist. Pl. Guiane, 235. 1775, Nom

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VIOLACEAE 1. RINOREA Aublet, Hist. Pl. Guiane, 235. 1775, Nom VIOLACEAE 堇菜科 jin cai ke Chen Yousheng (陈又生)1, Yang Qiner (杨亲二)1; Hideaki Ohba2, Vladimir V. Nikitin3 Herbs annual or perennial, shrubs, or subshrubs, sometimes scandent, rarely small trees. Leaves simple, usually alternate, some- times opposite, with small or leaflike stipules, petiolate, margin entire, serrate, or dissected. Flowers bisexual or unisexual, rarely polygamous, actinomorphic or zygomorphic, solitary or in axillary or terminal, spicate, paniculate, or racemose inflorescences, 2- bracteolate, sometimes cleistogamous. Sepals 5, equal or unequal, imbricate, persistent. Petals 5, imbricate or convolute, unequal, an- terior one usually larger than others, saccate, gibbous or spurred at base. Stamens 5; anthers erect, free or connivent or connate, con- nectives often dilated into membranous appendages; filaments very short or absent, anterior 2 stamens with spurlike nectary at base. Ovary superior, 1-loculed, 3–5-carpelled, syncarpous, with 3–5 parietal placentae each with 1 to many anatropous ovules; style sim- ple; stigmas variously shaped. Fruit a loculicidal capsule, usually with elastic and abaxially carinate valves, rarely baccate. Seeds often carunculate; testa hard, nitid, often with oily bodies, sometimes alate; endosperm copious, fleshy; embryo erect. Twenty-two genera and 900–1000 species: worldwide, but particularly in tropical regions; three genera and 101 species (36 endemic, three introduced) in China. Wang Chingrui. 1991. Violaceae. Fl. Reipubl. Popularis Sin. 51: i–v, 1–148. 1a. Shrubs or trees; inflorescences mostly more than 5-flowered; flowers actinomorphic, not spurred, not cleistogamous ...................................................................................................................................................................... 1. Rinorea 1b. Herbs or subshrubs; inflorescences 1–3-flowered; flowers distinctly zygomorphic (lowest petal spurred), or cleistogamous. 2a. Subshrubs; sepals basally not auriculate .................................................................................................................. 2. Hybanthus 2b. Herbs; sepals basally auriculate ......................................................................................................................................... 3. Viola 1. RINOREA Aublet, Hist. Pl. Guiane, 235. 1775, nom. cons. 三角车属 san jiao che shu Conohoria Aublet. Shrubs or small trees. Leaves alternate, rarely opposite, margin entire or serrate; stipules deciduous. Inflorescences axillary or terminal, racemose, paniculate, or sometimes cymose, rarely flowers solitary. Flowers bisexual, actinomorphic, small. Sepals sub- equal, leathery. Petals equal or subequal, not spurred. Filaments free or ± connate, inserted inside at top of disk; connectives dilated abaxially from base or from apex into thin, scarious appendages exceeding anthers. Disk circular, slightly 5-lobed. Ovary ovoid, with few or numerous ovules; styles erect; stigmas terminal, not divided. Capsule usually 3-valved, rarely 2-valved. Seeds few, ellipsoid, glabrous or pubescent. About 340 species: tropical Africa, tropical America, and tropical Asia; four species (one endemic) in China. 1a. Disk 5-lobed; stigmas slightly 3-lobed; stamens without filaments, connectives with granular scales ......................... 4. R. virgata 1b. Disk dilated and circular; stigmas not divided; stamens with filaments, connectives without abaxial scales. 2a. Appendages at top of connectives narrowly triangular, less than 1 mm, anthers lanate at base adaxially, apex barbate; stipules later deciduous; petioles 2–5 mm ..................................................................................... 3. R. erianthera 2b. Appendages at top of connectives not narrowly triangular, anthers without cushionlike tomentum at base adaxially, apex not barbate; stipules caducous; petioles 7–12 mm. 3a. Leaf veins raised on both surfaces, very conspicuous; pedicels to 1 cm; fruit small, less than 1 cm; seeds with brown dots .................................................................................................................................. 1. R. bengalensis 3b. Leaf veins slightly raised abaxially, not very conspicuous; flowers subsessile; fruit large, ca. 2 cm; seeds creamy-white ................................................................................................................................. 2. R. longiracemosa 1. Rinorea bengalensis (Wallich) Kuntze, Revis. Gen. Pl. 1: glandulosa Merrill (1928), not Merrill (1917); R. wallichiana 42. 1891. (J. D. Hooker & Thomson) O. Kuntze. 三角车 san jiao che Shrubs or small trees, 1–5 m tall. Young branches with conspicuous leaf scars, greenish, glabrous or with very few Alsodeia bengalensis Wallich, Trans. Med. Soc. Calcutta hairs; old branches dark brown. Leaves alternate, old ones 7: 224. 1835; A. wallichiana J. D. Hooker & Thomson; Rinorea subleathery, slightly nitid; stipules lanceolate, 1–1.7 cm, apex 1 Institute of Botany, Chinese Academy of Sciences, 20 Nanxincun, Xiangshan, Beijing 100093, People’s Republic of China. 2 University of Tokyo, 7–3–1 Hongo, Bunkyo-ku, Tokyo, Tokyo 113–0033, Japan. 3 V. L. Komarov Botanical Institute, Prof. Popov Street 2, 197376 Saint Petersburg, Russia. 72 VIOLACEAE 73 acuminate, fugacious, scar circular; petiole 5–12 mm, glabrous; clustered, petioles and stipules puberulous when young; stipules leaf blade elliptic-lanceolate or elliptic, (2.5–)5–12(–17) × 1.5– deciduous, narrowly triangular-lanceolate, subequaling petioles; 6 cm, veins raised on both sides, lateral veins alternate, 6–9- petiole very short, 2–5 mm; leaf blade yellow-green, rhombic- paired, veinlets reticulate, dense and conspicuous, base cuneate, elliptic to obovate-elliptic, 1.5–6.5 × 0.6–2.5 cm, membranous, rarely subrounded, margin serrulate, remotely toothed near base base cuneate, margin serrulate, apex acute to shortly acuminate. or subentire, apex acuminate. Flowers white, in axillary con- Flowers 1–3 in cymes, axillary in long branches; pedicels 1–1.5 tracted racemes; peduncles absent; pedicel to 1 cm, slightly cm, slender, hairy, with 2 bracteoles less than 1 mm at middle yellow tomentose. Sepals broadly lanceolate, ca. 2 mm, abaxi- or below. Sepals 5, yellow-green, 4.5–6 × 2–5.5 mm, imbricate; ally yellow-brown tomentose. Petals ovate-oblong, ca. 5 mm, outer 3 suborbicular, densely veined, apex apiculate; inner 2 apex recurved. Stamens with short filaments; anthers 2-loculed, elliptic, inconspicuously veined, hairy abaxially, margin ciliate. oblong, longitudinally dehiscent, appendages at top of con- Petals 5, white, brownish when dry, narrowly lanceolate, 9–11 nectives broadly ovate. Capsule subglobose, 3-valved. Seeds × 1.5–2 mm, hairy above middle abaxially, margin ciliate, re- broadly ovoid, glaucous, with brown dots. Fl. Apr–May and flexed after anthesis. Stamens yellowish white, ca. 9 mm; fila- Oct, fr. Sep. 2n = 16. ments linear, 2.5–3.5 mm; anthers linear, equaling or slightly exceeding filaments, lanate at base adaxially, thecae acuminate Thickets, dense forests; below 600 m. SW Guangxi, Hainan [In- dia, Malaysia, Myanmar, Sri Lanka, Thailand, Vietnam; NW Australia]. at apex, barbate, appendages at top of connectives narrowly tri- angular, less than 1 mm. Ovary narrowly globose, 3–5-angled; 2. Rinorea longiracemosa (Kurz) Craib, Fl. Siam. 1: 90. 1925. styles straight or curved, slender. Seeds (immature) brown, or- 短柄三角车 duan bing san jiao che bicular-reniform, compressed-flat, smooth, not nitid. Fl. Jun– Jul, fr. unknown. Alsodeia longiracemosa Kurz, J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 39(2): 63. 1870. ● Thickets; ca. 1300 m. SW Sichuan (Jinyang). Shrubs or small trees, 1–2 m tall. Young branches incon- 4. Rinorea virgata (Thwaites) Kuntze, Revis. Gen. Pl. 1: 42. spicuously cicatricate, yellow-brown tomentose; old branches 1891. gray-white, glabrous. Leaves alternate; stipules dark brown, nar- 鳞隔堇 lin ge jin rowly lanceolate or subulate, ca. 4 mm, slightly hairy, fuga- cious; petiole ca. 7 mm, yellow-brown puberulous when young, Scyphellandra virgata Thwaites, Enum. Pl. Zeyl. 21. sparsely puberulous when old; leaf blade elliptic or elliptic- 1858; Alsodeia virgata (Thwaites) J. D. Hooker & Thomson; lanceolate, (7–)12–14(–16) × (1.5–)3.5–4.5(–6) cm, glabrous, Rinorea pierrei (H. Boissieu) Melchior; S. pierrei H. Boissieu. veins not very conspicuous, slightly raised abaxially, midvein Shrubs erect, ca. 1 m tall. Young branches puberulous; old yellow-brown hairy near base, margin remotely serrate, teeth ones gray-white, glabrous. Lower leaves often 2- or 3-clustered, denser in upper half, apex caudate or long acuminate. Flowers upper ones alternate; stipules small, shorter than petioles, lan- glaucous, subsessile, in axillary contracted-racemes. Sepals 5, ceolate or subtriangular, slightly raised abaxially, pubescent; persistent, subtriangular. Corolla campanulate; petals 5, persis- petiole short, ca. 3 mm, tomentose; leaf blade ovate or elliptic, tent, subequal, elliptic. Stamens with short filaments. Capsule highly variable in size, (1.5–)3–4(–5) × (0.8–)1.5–2(–2.5) cm, subglobose, ca. 2 cm. Seeds creamy-white, subglobose. Fl. un- veins slightly raised, slightly puberulous, margin serrulate, apex known, fr. May. obtuse or ± acute. Flowers small, unisexual, actinomorphic, Lowland primary or secondary forests; below 1000 m. Hainan axillary, solitary or clustered. Staminate flowers: pedicels ca. 5 (Lingshui) [Cambodia, Indonesia, Laos, Malaysia, Myanmar, Thailand, mm, slender, slightly hairy or glabrous;
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